Blading for turbines.



L. A. HAINES.

BLDING POR TURBINES.

APPLICATION FILED 1111.25. 1910.

977,300. Patented Now/.29, 1910.

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LEWIS A. HAINES, OF COLUMBUS, OHIO.

BLADING FOR TURBINES.

Specification of Letters Patent.

Patented Nev. 29, 1910.

Application filed Apr1r25, 1910. Serial No. 557,449.

To all whom it may concern: Y Be it known that I, Lnwrs A. Hamas, a citizen of the United States, residing at Columbus, in the county of Franklin and State of Chio, have invented new and useful Improvements in Blading for Turbines, of which the following is a specification.

This invention relates to turbines and more particularly to blading or bucket means therefor.

One object of the invention is to provide a plurality of buckets assembled in flexible relation in predetermined lengths 1n the form of sections and to apply the said sections regularly around a carrying element in such manner that the individual sections may be readily removed when burned out or otherwise unfit for further use and replaced by a similar section without disturbing the remaining sections or dismantling the turbine.

With this and other objects and advantages in view, the invention consists in the construction and arrangement of the several parts which will be more fully hereinafter specified in preferred form.

In the drawings: Figure l is an elevation of a portion of a carrying element, partially in section, and showing the blades or buckets and space blocks therefor arranged in distinct groups or sections. Fig. 2 is a transverse vertical section through a portion of the structure as shown by Fig. 1. Fig. 3'is a detail perspective view of one of the sections or groups of blades or buckets and space blocks shown assembled and ready for application to the supporting or carrying element.

In my companion application Serial Number 557,448 led of even date herewith, a plurality of blades or buckets 8 and space blocks or spacers 9 are described as being assembled in the form of a flexible bar and then inserted and secured in a blade or bucket carrying element and secured against movement. In the said application the flexible bar composed of alternately arranged blades or buckets and space blocks is continuous around the carrying element, and in order to repair or replace any of the buckets or blocks it is necessary to remove the ent-ire series of buckets or blocks. For general purposes there would be no objection to this complete removal of the series of buckets and blocks, but in some applications or uses portions of the series of the buckets or blocks might be required to be replaced at comparatively frequent intervals, and in order to meet this Vcontingency the organization embodying the present features of the invention has been devised and consists in assembling and applying the buckets and blocks in group sections so that any one of the sections can be removed and replaced by an other similar section without disturbing or dismantling the remaining sections.

The same essential features of the invention are embodied in this instance as in the organization disclosed by my companion applicationv above noted, and consist of the blade or bucket carrying element 5 having a channel or groove 6 with counter grooves 7 in the side walls. The blades or buckets 8 and the blocks or spacers 9 are similar in all respects to those disclosed in my companion application and are respectively provided with openings 10 and l1 therethrough. In this instance, however, shorter strands or wires 12 are used and threaded through the alined openings 10 and 11 and the ends thereof projected beyond the terminal blades or buckets and projected through and upset against the inner portion of the carrying element 5, the short flexible bars or sections composed of the blades or bucket-s and blocks being tightened up before the ends of the wires 12 are secured. Between the ends of contiguous sections, blocks 14 are introduced and form wedges to additionally tighten the blades or buckets and space blocks embodied in each section, the key blocks being in all respects similar to the blocks 9 except that they do not have openings formed therethrough. The ends of the wire 12 are forced into downwardly extending or depending grooves 15 in the inner or base portions of the blades or buckets located at the contiguous ends of the sections, and by this means a full clearance is given for the introduction of the blocks 14k. After the wires 12 have been secured, a copper or other metallic calking or calking strip 16 is introduced in the channel or groove 6 and compressed, and the blocks 9 and 14 are swaged or compressed to cause portions of the said calking or strip 16 and the blocks to engage the grooves 7 and form keys as at 17 and 18, and to also close up any crevices that may be present between the contiguous portions of the blades or buckets and blocks. v

In removing any one of the sections the calking or calking stripl 16 Will be cut out SEE along the said section and in some instances it may be preferred that the said strip be made in lengths corresponding to the section. A'ter the removed section has been repaired, it may be replaced and secured by the introduction of new copper calking or a new copper or analogous metal calking strip.

lVhat is claimed is:

l. ln a turbine, the combination with a supporting element having a circumferential channel, of a plurality oi independent sections of blades prepared prior to their application to the supporting element and individually separable from said element, said sections each consisting ot' motive agent engaging means having a stringer extending therethrough and under tension, and devices interposed between the contiguous ends of the sections and engaging a portion of the terminals of the stringers thereof.

2. In a turbine, the combination with a supporting clement having a channel, ot a plurality ot' independent motive agent engaging sections individually applied to and removable from said element and having individual stringers extending therethrough, the motive agent engaging means and stringers being tightened up and held in close assembled relation prior tok their application to the supporting element, and securing means interposed between the ends of the sections and between the sides of the latter and one wall of the channel of the supporting element.

8. In a turbine, the combination with a supporting element, of a plurality of motive agent engaging sections applied to and removable from the element and having a tlexible means extending through each section, the extremities of the flexible means of the sections engaging portions of the supporting element and serving as a part of the securing means for the sections, and means interposed between the sides of the sections and a portion of the supporting element to serve as an additional securing means for said sections.4

4f'. In a turbine, the combination with a supporting element, of a plurality of groups of blades or buckets independently applied to and removable from the element and having a flexible means threaded therethrough prior toA application of the groups of blades or buckets to the supporting element, the opposite extremities ot' the iiexible means being projected through the supporting element and servingl as a portion of the securing means for the groups ot blades or buckets.

5. A blade or bucket section for use with a plurality of similar sections on a turbine consisting of a series of interfitting blades or buckets and space blocks between the inner extremities of the blades or buckets, and a flexible strand threaded through the blades or buckets and blocks and bent inwardly over portions et' the end blades or buckets.

(S. A blade or bucket section for use with a plurality oi similar sections on a turbine consisting et' motive engaging members, and a flexible stringer threaded through the members and bent against portions of the end members, the motive engaging members and Stringer being tightened up relatively to each other prior to application to a turbine.

In testimony whereof l have hereunto set my hand in presence of two subscribing witnesses.

LEVIS A. HAINES. Witnesses CHAs. S. HYER, JAMES L. Nolens, J r. 

